Gallus gallus vs biddy

Gallus gallus and biddy both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gallus gallus	Yes	No	No	No
biddy	Yes	No	No	No

As nouns, biddy is a hyponym of Gallus gallus; that is, biddy is a word with a more specific, narrower meaning than Gallus gallus:

Gallus gallus: a domestic fowl bred for flesh or eggs; believed to have been developed from the red jungle fowl
biddy: young bird especially of domestic fowl

Other hyponyms of Gallus gallus include chick, cock, rooster, capon, hen, spring chicken, Rhode Island red, Dominick, Dominique, Orpington.

Gallus gallus (noun)	biddy (noun)
a jungle fowl of southeastern Asia that is considered ancestral to the domestic fowl	young bird especially of domestic fowl
a domestic fowl bred for flesh or eggs; believed to have been developed from the red jungle fowl	adult female chicken